ADO.NET :: How To Update Values In DataTable
Dec 16, 2010
Sql Table has 2 fields "id" and "name". Also "id" is the primary key with identity. I am using data adapter to fill data table "myTable". This brings id/name pairs form the database and fill "myTable".
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Later I add new rows to "myTable".
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and call dataadapter.Update(myTable). Dataadapter will add new rows to the database and the database will assign new id to each new ecord. StoredProcedure which actually insert new record, returns @@identity. How can I add this @@identity to myTable
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Data Adapter insert new records reursively and each insert in the database causes @@identity to be returned. I want dataadapter to add @@identity to myTable.
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Apr 12, 2010
I have a typical gridview/formview master control setup. When I try to update or insert I don't get any errors but it also doesn't work. When I try to insert data all I get are null values and when I update, none of the values are updated. The formview looks like its working, but just doesn't. The primary key is an identity and it auto-increments by one.
[Code]....
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Jan 17, 2010
i want to build a datagrid bound to a datatable with several columns. One column has only a dropdownlist with the number of the rows in the datatable.
Here a samplescreenshot:
[URL]
I know how to bind the columns to a grid and its no problem to create such a dropdown list with the content for me, too. But i dont know how to sort the complete datatabl after changing one value of one dropdown listbox.
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Jul 27, 2010
What is the code to get the values of the selected data table row?
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Jun 19, 2010
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Oct 1, 2010
i have number of values in a datatable... I need to insert that datatable values into DataBase. how i can get the values from Datatable and insert values one by one
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Mar 24, 2010
following is my code to update my database from a datatable. My rows are manipulated by my code perfectly. that i can see in my gridview but my database is not getting updated according to the manipulation
Code:
[Code]....
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Sep 21, 2010
I have a datatable dt with 4 columns. I want to retrieve only distinct values from column1 of datatable.
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Mar 10, 2011
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Jan 26, 2011
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Dec 27, 2010
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Feb 17, 2011
I'm .NET newbie and I have to write function which executes stored procedure and return DataTable.
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public DataTable ExecStoredProcedure(String spName, String uId)
{
DataTable dt = new DataTable();
try
{
conn.Open();
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}
catch (SqlException ex)
{
throw new Exception(ex.StackTrace + ex.Message);.......
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Oct 25, 2010
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Dec 17, 2010
if (dt.Rows[i]["Code"] == code)
{
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lblLang.Visible = true;
}
else
{
}
}
I am adding a new language Fr-FR in the code above. fr-FR already exists in my DB's Language Table. I do not want to add duplicate values in my table. There should be only one fr-FR.
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Feb 28, 2011
I am trying to search how to select rows from a datatable. When selecting these rows I should be able to delete the row or edit (update) the row.
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DataTable dtTypes = new DataTable();
SqlConnection con = new SqlConnection(Settings.Default.JLTrackConnectionString);
SqlCommand cmd = new SqlCommand("SelectJobTrackForDate", con); [code]....
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Nov 14, 2010
I have a Datatable store in the Session. This Datatable has a column call Qty. I have one button on the page that will update the Qty. How can I update my DataTable Qty column?
[Code]....
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Oct 19, 2010
I have a datatable which has been dynamically generated from FoxPro tables using a UNION Select statement. e.g.
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I have a public class Color which just has one property which I can then use as the DataTextField and DataValueField for the dropdownlist
[code]...
However this never results in the distinct colors.
I have searched and searched for what I am looking for, and this seems to be one of the methods to produce a distinct set of results, but this and the others do not work.
My reasoning behind getting the colors this way, is that I need to get various other distinct values from the same UNION SELECT datasource, so would just do one DB call, cache the results, and then just used this cached datasource to retrieve all my distinct values.
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Jan 19, 2011
i have a list for my shopping cart which i currently store in my datatable and then store it in a session. to avoid using sessions is it best to create a class where the datatable is stored and can be accessed from anywhere?
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Jan 24, 2012
I need to display the softwares expired validating it with current date.....
but when i fill the dataset and displaying the data in a label.
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iam getting a error on 4th label as it is empty so wat condition should i mention to overcome this problem...
my sample code----
Dim cmd As SqlCommand = New SqlCommand("select distinct productname from productinfo where expirydate > ='" + localdate + "' ", conn) Dim dalogin As SqlDataAdapter = New SqlDataAdapter(cmd) Dim dtlogin As DataSet = New DataSet() dalogin.Fill(dtlogin) If (dtlogin.Tables(0).Rows.Count > 0) Then lblexpiry1.Text = dtlogin.Tables(0).Rows(0).Item(0) If dtlogin.Tables(0).Rows(1).Item(0) Is Nothing Then td1.InnerHtml = "" Else Label1.Text = dtlogin.Tables(0).Rows(1).Item(0) End If If dtlogin.Tables(0).Rows(2).Item(0) Is Nothing Then td1.InnerHtml = "" Else Label2.Text = dtlogin.Tables(0).Rows(2).Item(0) End If If dtlogin.Tables(0).Rows(3).Item(0) Is Nothing Then td1.InnerHtml = "" Else Label3.Text = dtlogin.Tables(0).Rows(3).Item(0) End If Label4.Text = dtlogin.Tables(0).Rows(4).Item(0) Label5.Text = dtlogin.Tables(0).Rows(5).Item(0) Label6.Text = dtlogin.Tables(0).Rows(6).Item(0) Label7.Text = dtlogin.Tables(0).Rows(7).Item(0) Label8.Text = dtlogin.Tables(0).Rows(8).Item(0) Label9.Text = dtlogin.Tables(0).Rows(9).Item(0) End If
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Mar 17, 2011
I need to perform update operation in a datatable without using loops. Is there any way to perform update in a datatabel...
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Dec 9, 2010
getting a particular datatable values from the server to the client using javascript.
Ex.In my class which is Countries.aspx.cs I have this somewhere on my code say on the page load.
DataTable dtbCountries = Repository.GetAllCountries;
my dtbCountries now contains this record
ID Country
1 HongKong
2 Japan
3 Korea
In my webform I want to get the values of my dtbCountries using javascript
<script type="text/javascript">
// my code here to get the dtbCountries values
</script>
What should I do? Or what's the best thing to do to expose my dtbCountries in the client.
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Feb 7, 2011
I have a 3 column datatable in a session. I know I can use DataAdapter to do the insert but i only need to insert 2 of the columns.
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May 25, 2010
I have 7 different category pages and although the Cart Page shows selected items From the 1 category , when i select other category page it only shows the selections of first page and not the others.
How can i make the DataTable Draw values from all the pages and display them on the Cart? code in first category
[Code]....
i m trying to put the same in each category but it doesn'twork
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Feb 4, 2011
My datatable consists of a column named "ID". The no. of values in this column varies.Sometimes this Datatable fetches 3 IDs in that ID column, sometimes 2. Now if for example, my datatable has three values as 1,2,3. What I want is to put these three values in a string and separate them by commas as folows:-
string test= "1,2,3";
If Datatable has 2 values, then string should be as follows:-
string test= "1,2";
I did try but in vain.
edit:-
DataTable dt=new DataTable;
dt = obj.GetIDs();
for (int i = 0; i < dt.Rows.Count; i++)
{
string test= "What should be here????";
}
edit 2
foreach(DataRow dr in dt.Rows)
{
string str = str + "," + Convert.ToString(dr("ID"));
}
@Rajeev ::Tried this..it says dr is a variable but used as a method. What's wrong?
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Apr 2, 2013
I had a problem in binding the checkbox list. Here I explain I had a database with 3 columns.
ex:
address name number
bangalore seker 987585
mangalore shankar 658741
bangalore kanna 589725
Now I have select the bangalore in address,so i may get seker and kanna.
And now i have display in my page as like this to checkbox.
seker
987585 same kanna sholud be displayed.
that is, the seker should be in label and the number should be in checkbox.
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